Finding the Fourth Proportional to 69,213.40, 103,601.40 and 54,341.80

Step by Step Solution

1. Step 1: Write the proportion equation
   69,213.40 : 103,601.40 = 54,341.80 : x
2. Step 2: Convert to fraction form
   69,213.40/103,601.40 = 54,341.80/x
3. Step 3: Cross multiply
   69,213.40x = 103,601.40 × 54,341.80
4. Step 4: Simplify right side
   69,213.40x = 5,629,886,558.52
5. Step 5: Solve for x
   x = 5,629,886,558.52/69,213.40
6. Step 6: Final answer
   x = 81,340.99